1. Preheat oven to 350 degrees F. Line two baking sheets with parchment paper and set aside.

2. Whisk together the flour, baking soda and salt; set aside.

3. On medium speed, cream together the butter, peanut butter, granulated sugar, brown sugar and vanilla extract, about 3 minutes. Add the egg and beat to combine. On low speed, gradually add the flour until just combined. Stir in the oats, and then the chocolate chips and peanut butter cups.

4. Use a large cookie scoop (3 tablespoons) and drop dough onto prepared baking sheets about 2 inches apart. Bake for 10-12 minutes, or until the cookies are lightly golden. Cool completely on the baking sheet and then store in an airtight container at room temperature.